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US Patent: 51,564
Improvement in Plumb-Level
Inclinometer
Patentee:
Gustavus Cuppers - New York, NY

USPTO Classifications:
33/391

Tool Categories:
layout tools : levels : inclinometers
layout tools : levels : pendulum levels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Jos. L. Coombs
J. Lane
Jno. S. Harley
T. C. Campbell

Patent Dates:
Granted: Dec. 19, 1865

Patent Pictures:
USPTO pdf tiff
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Description:
This is a "mantel" style inclinometer, with a graduated dial and an unusual method of suspending the indicator.

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